Geographic variation in the laryngeal morphology of a widely distributed South-American anuran: behavioural and evolutionary implications

López, Carlos Ariel; Quispe, Maricel; Villalón, Aldo; Concha, Miguel L.; Penna, Mario; Velásquez, Nelson

doi:10.1093/zoolinnean/zlz175

Cited by 5 publications

(5 citation statements)

References 61 publications

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“…Other studies report that the higher the body height, "the laryngeal measurements were statistically significant", and higher for males [31]. Variations in laryngeal structure may explain much of the interpopulation signal differences [32].…”

Section: Discussionmentioning

confidence: 91%

Assessment of Asymmetry Formaline-Fixed Bovine Vocal Folds using Geometric Morphometrics

Salamanca-Carreño¹,

Casanova²,

Vélez-Terranova³

et al. 2023

Preprint

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The vocal folds are found in the larynx and their vibrations produce the voice. Little is known about morphology and the size of cattle larynx. The aim of the study was to quantify the shape asymmetry of the vocal folds in calves obtained post-mortem using a geometric morphometric approach. A sample of 14 larynges from calves (in an age range 335 to 625 days) belonging to “Bruna dels Pirineus” breed and its F1 crosses was obtained in an abattoir during the first semester of 2021. Landmark sets were superimposed on images of fixed transverse sections of larynges. Using geometric morphometric techniques, we analysed the presence of asymmetries. Results demonstrate differences between right and left vocal fold sides as directional asymmetry, at least in fixed structures. Our findings provide a foundation for quantifying the possible contribution of vocal organ asymmetry among cattle. This study can be considered the first to detect vocal fold asymmetries in cattle. Studies with a larger sample size are needed to validate the information in large populations. One limitation is that the present study does not have samples from adult animals, so it would be interesting to know if the results are similar among them.

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Section: Discussionmentioning

confidence: 91%

Assessment of Asymmetry Formaline-Fixed Bovine Vocal Folds using Geometric Morphometrics

Salamanca-Carreño¹,

Casanova²,

Vélez-Terranova³

et al. 2023

Preprint

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“…On the other hand, other acoustic variables might vary as a consequence of variation on certain anatomical traits of the larynx, such as size and mass of the vocal membrane and the signal frequencies (see López et al, 2020; Martin, 1971). Even in these cases, different taxa may produce similar acoustic features by different mechanisms.…”

Section: Discussionmentioning

confidence: 99%

Description and evolution of the larynx of thePhysalaemus olfersiispecies group, with remarks on the laryngeal anatomy of theP. cuviericlade (Amphibia: Anura: Leiuperinae)

Vega¹,

Pombal

Hepp³

2021

Journal of Anatomy

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The anuran larynx is an organ of great evolutionary interest because it impacts male reproductive success in courtships. However, little is known about the diversity of the larynx's anatomy, evolutionary history and systematics importance. Here, we describe and compare the anatomy of the larynx of 10 Physalaemus species of the P. cuvieri clade, focusing on the P. olfersii species group. We also reconstructed the ancestral states and tested the phylogenetic signal for the anatomical features. In all the species, the larynx has a general globular shape with the arytenoid cartilages covering almost its entire dorsal surface, while the anterior process of the cricoid cartilages covers most of the ventral surface. The size of the secondary fibrous mass, the thickness of the vocal membrane, and the attachment position of the vocal membrane's free edge considerably differ among the species. Moreover, only four species of a single clade in the P. olfersii species group have the primary fibrous mass well‐developed with a suspended region in the dorsolateral passage. We found a significant phylogenetic signal for all these characters. Ancestral reconstructions pointed to reduction tendencies in the thickness of the vocal membrane and the size of the secondary fibrous mass, and a shift of the ventral attachment of the vocal membrane, increasing the angle of its free edge along the phylogeny. This latter trait can diagnose the entire Physalaemus olfersii group, which has the ventral ends of the arytenoids positioned posteriorly, giving this group the steepest angles for the vocal membrane's free edge in relation to the frontal plane. Based on our results, the larynges can contribute to the Physalaemus olfersii species group's systematics and could be elucidative to understand the evolution of the genus. High levels of anatomical and bioacoustical complexity and diversity observed in the group support the expected correlation between vocal anatomy and bioacoustical signal.

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“…Similar to other vertebrates, the frequency content of frog vocalizations is determined by the size of larynx structures (e.g. Baugh et al 2018, López et al 2020). Because larynx size scales with body size, smaller frog species tend to produce higher frequency calls (Tonini et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Amplification of frog calls by leaf substrates: implications for terrestrial and arboreal species

Muñoz

Halfwerk²

2020

Preprint

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Signal detection is a minimum requirement for any communicative interaction. Acoustic signals, however, often experience amplitude losses during their transmission through the environment, reducing their detection range. Displaying from sites that increase the amplitude of the sound produced, such as cavities or some reflective surfaces, can improve the detectability of signals by distant receivers. Understanding how display sites influence sound production is, however, far from understood. We measured the effect of leaf calling sites on the calls of an arboreal (Hyalinobatrachium fleischmanni) and a leaf-litter specialist (Silverstoneia flotator) frog species. We collected the leaves where males of both species were observed calling, and conducted playback experiments to measure their effect on the amplitude of frog calls. Overall, the leaves used by H. fleischmanni and S. flotator were of similar dimensions, and amplified the calls of each species by about 5.0 and 2.5 dB, respectively. The degree of call amplification was unrelated to leaf dimensions or the position of the frogs on the leaves, but explained by the different frequency content of the calls of each species. Depending on the spatial location of intended and unintended receivers, we suggest that amplification of frog calls by leaves could represent either a benefit or impose costs for arboreal and terrestrial species. We argue that the microhabitat of the substrate from which animals display needs to be considered when addressing signal evolution.

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Geographic variation in the laryngeal morphology of a widely distributed South-American anuran: behavioural and evolutionary implications

Cited by 5 publications

References 61 publications

Assessment of Asymmetry Formaline-Fixed Bovine Vocal Folds using Geometric Morphometrics

Assessment of Asymmetry Formaline-Fixed Bovine Vocal Folds using Geometric Morphometrics

Description and evolution of the larynx of thePhysalaemus olfersiispecies group, with remarks on the laryngeal anatomy of theP. cuviericlade (Amphibia: Anura: Leiuperinae)

Amplification of frog calls by leaf substrates: implications for terrestrial and arboreal species

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